Cooktop exhaust hood



FIG. 1 is a top view showing the cooktop exhaust hood showing my new design;

FIG. 2 is a front view thereof with a broken line showing of the relief for illustrative purposes only and form no part of the claimed design;

FIG. 3 is a side view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a rear view thereof. 

I claim the ornamental design for a cooktop exhaust hood, as shown and described. 